ZWO 31mm H-alpha, SII, OIII 7nm Narrowband Filter Set - UNMOUNTED - Mark II Wide Field Imaging The ZWO ASIAIR Plus 256GB

The ZWO ASIAIR Plus 256GB is one of the most important accessories in modern amateur astrophotography

Alex Nicholas

Hard-coated

well-known MFR Coating technique gives you the best out-of-band blocking possible across the entire range of wavelengths from UV up to IR

it removes much of the complexity from deep-sky astrophotography

ZWO 31mm H-alpha, SII, OIII 7nm Narrowband Filter Set - UNMOUNTED - Mark II Wide Field Imaging The ZWO ASIAIR Plus 256GBNarrowband filters are used to create high contrast deep sky images of certain objects, mainly emission and diffuse nebulae (i. e. Veil Nebula, M42 Orion Nebula, North America Nebula, Horsehead Nebula) or planetary nebulae (i. e. M27 Dumbbell nebula, M57 Ring Nebula, Helix Nebula), just to mention few of well known nebulosities. Narroband filter sets are sometimes used instead of LRGB filter sets and sometimes in combination with them However, if you